remove duplicate secret key handling

app.py

@@ -32,13 +32,21 @@ from steganography import embed_message, extract_message
 
 # Add this function to handle secret key persistence
 def get_or_create_secret_key():
+    """Get existing secret key or create a new one"""
     secret_key_file = Path("secret.key")
+    try:
         if secret_key_file.exists():
+            logger.info("Loading existing secret key")
             return secret_key_file.read_bytes()
         else:
-        secret_key = os.urandom(24)
+            logger.info("Generating new secret key")
+            secret_key = os.urandom(32)  # Use 32 bytes for better security
             secret_key_file.write_bytes(secret_key)
             return secret_key
+    except Exception as e:
+        logger.error(f"Error handling secret key: {e}")
+        # Fallback to a memory-only key if file operations fail
+        return os.urandom(32)
 
 DEFAULT_CONFIG = {
     "server": {"host": "0.0.0.0", "port": 5000},
@@ -221,9 +229,6 @@ limiter = Limiter(
     storage_uri="memory://",
 )
 
-# Generate a strong secret key at startup
-app.secret_key = secrets.token_hex(32)
-
 @app.before_request
 def before_request():
     g.csp_nonce = secrets.token_hex(16)